Material for cleaning the types of printing apparatus and process for its preparation



Patented Dec. 28, 1926.

UNITED STATES ERNST THALMANN, OF WINTERTHUR, SWITZERLAND.

MATERIAL non CLEANING THE TYPES OF PRINTING APPARATUS AND ;P ROCESS FOR ITS PREPARATION.

No Drawing. Application filed October 10. 1922, Serial No. 593,627, and in Switzerland April 3, 1922.

manner, (by way of example). A plastic.

compound containing clay and glycerine, and, if desired, a suitable coloring matter, is mixed with a predetermined quantity of colophonium and petroleum. Such a com-' pound may be prepared by mixing together clay and glycerine in the approxi mate proportions of 40 parts and 10 parts by weight respectively and adding thereto approximately 10 parts by weight of l a concentrated solution of' colophonium in crude petroleum. A mixture of pulverized Para rubber and tale in approximately equal parts by weight is then prepared, and 30-40 parts by weight of this mlxture 1s mixed with -70 parts by weight of the first mixture. To the mass thus obtained is then added pure glyeerine and a small quantity of a solution of resin, preferably in the form of a slimy semi-fluid mass, gamboge having been found to be a suitable form of resin for this purpose, and the preferred solvent being petroleum. The entire mixture is then pressed and heated, after which it is rolled between heated rollers until it is reduced to a very fine, homogeneous plastic mass, which is then preferably pressed into strands, from which plugs of convenient size are cut.

The cleansing mass thus prepared is very permanent. It does not become hard, but

retains its plasticity for a very long time, anda plug can, after use, be rendered suitable for re-use by kneading it, and this may continue for months.

The application of the material consists in pressing the mass upon the types and immediately removing such mass (dabbing). whereby the dirt is taken up by the mass leaving the types clean again.

The dirty part of the mass is preferably each time folded inwards and in this manner one plug can be utilized for a long period,

without loss of materiahand Without losing its effect. I

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim and desire to secure by Letters Patent of the United States is 1. A cleansing compound for the type of printing apparatus comprising a plastic mass containing a mixture of clay, glyeerine, eolophonium, petroleum, Para rubber, talc. and resin.

A cleansing compound for the type of printing apparatus, comprising a plastic mass containing a mixture of clay, glycerine, eolophonium and petroleum, and a mixture of Para rubber, resin and talc, the proportion of the first mixture being approximately 60 to by weight and that of the second mixture approximately 30 to 40 by weight;

3. Theprocess of manufacturing a cleaneing compound for the type of printing apparatus, which consists in mixing together a plastic compound containing clay, glycerine. colophonium and petroleum, adding thereto a mixture of pulverized rubber and talc, add- ERNST THALMANN. 

